0004_migrate_optout_user.py

# -*- coding: utf-8 -*-
from south.db import db
from south.v2 import DataMigration
from django.core.exceptions import ObjectDoesNotExist


class Migration(DataMigration):

    def forwards(self, orm):

        # forwards data migration to copy over existing emails to associated ids
        if not db.dry_run:
            for optout in orm.Optout.objects.all():
                try:
                    user = orm['auth.User'].objects.get(email=optout.email)
                    optout.user = user
                    optout.save()
                except ObjectDoesNotExist:
                    # if user is not found (because they have already changed their email)
                    # then delete the optout, as it's no longer useful.
                    optout.delete()

    def backwards(self, orm):

        # backwards data migration to copy over emails of students to old email slot
        if not db.dry_run:
            for optout in orm.Optout.objects.all():
                if optout.user is not None:
                    optout.email = optout.user.email
                    optout.save()

    models = {
        'auth.group': {
            'Meta': {'object_name': 'Group'},
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '80'}),
            'permissions': ('django.db.models.fields.related.ManyToManyField', [], {'to': "orm['auth.Permission']", 'symmetrical': 'False', 'blank': 'True'})
        },
        'auth.permission': {
            'Meta': {'ordering': "('content_type__app_label', 'content_type__model', 'codename')", 'unique_together': "(('content_type', 'codename'),)", 'object_name': 'Permission'},
            'codename': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
            'content_type': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['contenttypes.ContentType']"}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'name': ('django.db.models.fields.CharField', [], {'max_length': '50'})
        },
        'auth.user': {
            'Meta': {'object_name': 'User'},
            'date_joined': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime.now'}),
            'email': ('django.db.models.fields.EmailField', [], {'max_length': '75', 'blank': 'True'}),
            'first_name': ('django.db.models.fields.CharField', [], {'max_length': '30', 'blank': 'True'}),
            'groups': ('django.db.models.fields.related.ManyToManyField', [], {'to': "orm['auth.Group']", 'symmetrical': 'False', 'blank': 'True'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'is_active': ('django.db.models.fields.BooleanField', [], {'default': 'True'}),
            'is_staff': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
            'is_superuser': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
            'last_login': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime.now'}),
            'last_name': ('django.db.models.fields.CharField', [], {'max_length': '30', 'blank': 'True'}),
            'password': ('django.db.models.fields.CharField', [], {'max_length': '128'}),
            'user_permissions': ('django.db.models.fields.related.ManyToManyField', [], {'to': "orm['auth.Permission']", 'symmetrical': 'False', 'blank': 'True'}),
            'username': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '30'})
        },
        'bulk_email.courseemail': {
            'Meta': {'object_name': 'CourseEmail'},
            'course_id': ('django.db.models.fields.CharField', [], {'max_length': '255', 'db_index': 'True'}),
            'created': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'blank': 'True'}),
            'html_message': ('django.db.models.fields.TextField', [], {'null': 'True', 'blank': 'True'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'modified': ('django.db.models.fields.DateTimeField', [], {'auto_now': 'True', 'blank': 'True'}),
            'sender': ('django.db.models.fields.related.ForeignKey', [], {'default': '1', 'to': "orm['auth.User']", 'null': 'True', 'blank': 'True'}),
            'slug': ('django.db.models.fields.CharField', [], {'max_length': '128', 'db_index': 'True'}),
            'subject': ('django.db.models.fields.CharField', [], {'max_length': '128', 'blank': 'True'}),
            'text_message': ('django.db.models.fields.TextField', [], {'null': 'True', 'blank': 'True'}),
            'to_option': ('django.db.models.fields.CharField', [], {'default': "'myself'", 'max_length': '64'})
        },
        'bulk_email.optout': {
            'Meta': {'unique_together': "(('user', 'course_id'),)", 'object_name': 'Optout'},
            'course_id': ('django.db.models.fields.CharField', [], {'max_length': '255', 'db_index': 'True'}),
            'email': ('django.db.models.fields.CharField', [], {'max_length': '255', 'db_index': 'True'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'user': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['auth.User']", 'null': 'True'})
        },
        'contenttypes.contenttype': {
            'Meta': {'ordering': "('name',)", 'unique_together': "(('app_label', 'model'),)", 'object_name': 'ContentType', 'db_table': "'django_content_type'"},
            'app_label': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'model': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
            'name': ('django.db.models.fields.CharField', [], {'max_length': '100'})
        }
    }

    complete_apps = ['bulk_email']